US 2003/0200826 A1Published application

Starting apparatus

AssigneeDenso Corporation

InventorsTomohiro Oomura, Kazuo Hirama, Mitsuhiro Murata, Tatsuya Saitou, Hiroshi Kaneda, Shinji Usami

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Abstract

A starting apparatus includes a drive motor and a reduction gear having a planetary gear for starting an engine by the drive motor via the reduction gear. An internal gear of the reduction gear includes a locking projection projecting in an axial direction. A rotation restricting member is formed with a guide groove in which the locking projection is loosely received and guided in a circumferential direction. A shock absorbing member is held in the guide groove in a state of being elastically in close contact with the locking projection in the circumferential direction. Thus, shock load to the internal gear is alleviated from the start.

Claims20

Dependent claims

A starting apparatus for starting an engine comprising:

a drive motor;
and
a reduction gear including:
a sun gear disposed to rotate by receiving an input from the drive motor;
an internal gear arranged concentrically with the sun gear and surround an outer periphery of the sun gear;
a planetary gear meshing with the sun gear and the internal gear;
a carrier rotatably supporting the planetary gear and outputting the input of the sun gear by reducing a speed thereof;
a rotation restricting member to restrict free rotation of the internal gear;
and
a shock absorbing member interposed between the internal gear and the rotation restricting member to alleviate a shock applied to the internal gear;
wherein the internal gear includes a locking projection projecting from a side face of the internal gear in an axial direction of the reduction gear, and the rotation restricting member is formed with a guide groove for guiding the locking projection in a circumferential direction,
wherein the locking projection of the internal gear is loosely received in the guide groove of the rotation restricting member, and the shock absorbing member is held in the guide groove in a state of being elastically in close contact with the locking projection in the circumferential direction.

9 more elements

A starting apparatus for starting an engine comprising:

a drive motor;
and
a reduction gear including:
a sun gear disposed to rotate by receiving an input from the drive motor;
an internal gear arranged concentrically around the sun gear and movable in a circumferential direction;
a planetary gear meshing with the sun gear and the internal gear;
a carrier rotatably supporting the planetary gear and outputting an input of the sun gear by reducing a speed thereof;
and
a rotation constraining unit to constrain movement of the internal gear, wherein the rotation constraining unit includes:
a movable locking portion integrated with the internal gear to move with the internal gear in the circumferential direction;
an unmovable locking portion held in a state unmovable in the circumferential direction and opposed to the movable locking portion in the circumferential direction;
and
a shock absorbing member including a main elastic block portion that is elastically held between the movable locking portion and the unmovable locking portion to receive a reaction force applied to the internal gear when the drive motor starts to rotate the engine via the reduction gear.

10 more elements

Dependencies are inferred from the claim text.